Fix broadcast

[dfdx]

No description provided.

[codecov-commenter]

Codecov Report

Base: 78.93% // Head: 78.71% // Decreases project coverage by -0.22% ⚠️

Coverage data is based on head (99cb1f3) compared to base (2d6474d).
Patch coverage: 79.59% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #128      +/-   ##
==========================================
- Coverage   78.93%   78.71%   -0.23%     
==========================================
  Files           8        8              
  Lines         432      451      +19     
==========================================
+ Hits          341      355      +14     
- Misses         91       96       +5     

Impacted Files	Coverage Δ
src/rulesets.jl	85.04% <41.66%> (-6.05%)	⬇️
src/utils.jl	66.66% <71.42%> (+33.33%)	⬆️
src/grad.jl	87.58% <80.00%> (+0.16%)	⬆️
src/chainrules.jl	96.66% <100.00%> (ø)

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